I take Abilify, Paxil, and Clonazepam. I don't know which one is causing it, but I'm sure it's a side effect. I get this overwhelming urge to gag, like something is stuck in my throat, pushing its way up. It's definitely NOT sinus drainage. I end up throwing up a couple times a day. So far I haven't found a way to really "deal" with it. I'm just trying to get my doctors to believe me (I have bad doctors).